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1243 Pamela
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date7 May 1932
Designations
(1243) Pamela
Named after
Pamela Jackson [2]
(discoverer's daughter)
1932 JE · 1929 XD
1934 VL · 1951 AN
1954 JO
main-belt · ( outer) [3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 ( JD 2458000.5)
Uncertainty parameter 0
Observation arc85.66 yr (31,287 days)
Aphelion3.2409 AU
Perihelion2.9512 AU
3.0960 AU
Eccentricity0.0468
5.45 yr (1,990 days)
165.56 °
0° 10m 51.24s / day
Inclination13.286°
245.68°
56.586°
Physical characteristics
Dimensions66.11±23.05 km [5]
69.883±0.420 km [6]
69.991±1.389 km [7]
70.06 km (derived) [3]
70.07±5.9 km [8]
70.25±1.00 km [9]
70.97±20.63 km [10]
76.42±0.67 km [11]
26.00±0.01 h [12]
26.0±0.1 h [13]
26±0.5 h [13]
26.017±0.003 h [14] [a]
0.040±0.005 [11]
0.04±0.02 [10]
0.04±0.06 [5]
0.0474 (derived) [3]
0.048±0.002 [9]
0.0483±0.009 [8]
0.0484±0.0102 [7]
C [15] · C (assumed) [3]
9.60 [10] · 9.68 [7] [8] [9] · 9.70 [1] [3] [11] · 9.71 [5] · 9.90±0.29 [15]

1243 Pamela, provisional designation 1932 JE, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 70 kilometers in diameter. It was discovered on 7 May 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johnannesburg. [16] The asteroid was named for Pamela Jackson, daughter of the discoverer. [2]

Orbit and classification

Pamela is a non- family asteroid from the main belt's background population. [4] It orbits the Sun in the outer main-belt at a distance of 3.0–3.2  AU once every 5 years and 5 months (1,990 days; semi-major axis of 3.10 AU). Its orbit has an eccentricity of 0.05 and an inclination of 13 ° with respect to the ecliptic. [1]

The asteroid was first observed at Lowell Observatory in November 1929. The body's observation arc begins at Johannesburg in April 1932, or one month prior to its official discovery observation. [16]

Physical characteristics

Pamela has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. [15]

Rotation period

In October 1999, a first rotational lightcurve of Pamela was obtained from photometric observations by Brian Warner at his Palmer Divide Observatory in Colorado, United States. Lightcurve analysis gave a rotation period of 26.017 hours with a brightness amplitude of 0.49 magnitude ( U=2). [14] [a] Other lightcurves were taken by the Spanish amateur group OBAS in 2015 ( U=2), [12] as well as by René Roy and Stéphane Charbonnel in France, and Roberto Crippa and Federico Manzini at Sozzago Astronomical Station ( A12) in Piedmont, Italy, between 2005 and 2010 ( U=2/1/2/2-). [13]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Pamela measures between 66.11 and 76.42 kilometers in diameter and its surface has an albedo between 0.040 and 0.0484. [5] [6] [7] [8] [9] [10] [11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0474 and a diameter of 70.06 kilometers based on an absolute magnitude of 9.7. [3]

Naming

This minor planet was named after Cyril Jackson's daughter, Pamela Jackson. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 114). [2]

Notes

  1. ^ a b Lightcurve plot of 1243 Pamela, Palmer Divide Observatory, B. D. Warner (1999). Rotation period 26.017±0.003 hours with a brightness amplitude of 0.49±0.03 mag. Summary figures at the LCDB.

References

  1. ^ a b c d "JPL Small-Body Database Browser: 1243 Pamela (1932 JE)" (2017-12-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 January 2018.
  2. ^ a b c Schmadel, Lutz D. (2003). "(1243) Pamela". Dictionary of Minor Planet Names – (1243) Pamela. Springer Berlin Heidelberg. p. 103. doi: 10.1007/978-3-540-29925-7_1244. ISBN  978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (1243) Pamela". Asteroid Lightcurve Database (LCDB). Retrieved 4 January 2018.
  4. ^ a b "Asteroid 1243 Pamela – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
  5. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923. Bibcode: 2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63.
  6. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv: 1406.6645. Bibcode: 2014ApJ...791..121M. doi: 10.1088/0004-637X/791/2/121. S2CID  119293330.
  7. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407. Bibcode: 2011ApJ...741...90M. doi: 10.1088/0004-637X/741/2/90. S2CID  35447010.
  8. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. Retrieved 22 October 2019.
  9. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode: 2011PASJ...63.1117U. doi: 10.1093/pasj/63.5.1117. ( online, AcuA catalog p. 153)
  10. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522. Bibcode: 2015ApJ...814..117N. doi: 10.1088/0004-637X/814/2/117. S2CID  9341381. Retrieved 4 January 2018.
  11. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv: 1209.5794. Bibcode: 2012ApJ...759L...8M. doi: 10.1088/2041-8205/759/1/L8. S2CID  46350317. Retrieved 4 January 2018.
  12. ^ a b Garceran, Alfonso Carreno; Aznar, Amadeo; Mansego, Enrique Arce; Rodriguez, Pedro Brines; de Haro, Juan Lozano; Silva, Alvaro Fornas; et al. (January 2016). "Nineteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2015 April – September". The Minor Planet Bulletin. 43 (1): 92–97. Bibcode: 2016MPBu...43...92G. ISSN  1052-8091. Retrieved 4 January 2018.
  13. ^ a b c Behrend, Raoul. "Asteroids and comets rotation curves – (1243) Pamela". Geneva Observatory. Retrieved 4 January 2018.
  14. ^ a b Warner, B. (March 2000). "Asteroid Photometry at the Palmer Divide Observatory". The Minor Planet Bulletin. 27: 4–6. Bibcode: 2000MPBu...27....4W. Retrieved 4 January 2018.
  15. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762. Bibcode: 2015Icar..261...34V. doi: 10.1016/j.icarus.2015.08.007. S2CID  53493339. Retrieved 4 January 2018.
  16. ^ a b "1243 Pamela (1932 JE)". Minor Planet Center. Retrieved 4 January 2018.

External links

Retrieved from " https://en.wikipedia.org/?title=1243_Pamela&oldid=1191755113"

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